95 ZJ throwing codes 12, 21, 52 need advice
OK, when my Jeep is cold it has a condition while driving which feels like the ignition tries to shut off for a second or two then it runs fine again. This is not constant and only does it until the engine warms up then the cel light comes on and the Jeep seems to run fine.
I checked the codes and the only ones that really show up are for the o2 sensor. Mine only has the one o2 sensor. Both codes are saying bad o2 sensor but before I go and replace it, just wondering if this could be the cause of the stumble, shut off during the engine warm up period? I was thinking that on the OBD 1 systems, the o2 normally doesnt affect the engine enough to cause it to stumble or shut off for a second or two.
I have already did the harness plug to PCM cleanup and zip tie fix so I know its not that.
Sort of acts like it just shuts off for a split second or two then runs fine again up until the CEL comes on, which probably means its going into open loop/limp mode.
My cat was busted up, so I had to remove it temporarily until I get up funds to buy a Magnaflow high flow Cat to put back on it.
Any help or advice is greatly appreciated. I love my Jeep and its my DD also and other than this problem it has been running great for me. I would like to get this fixed so I can continue to work at optimizing my fuel milage, which is my main focus right now.